CN113203734A - Shearing and damaging experimental method for granular materials of particles - Google Patents
Shearing and damaging experimental method for granular materials of particles Download PDFInfo
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- CN113203734A CN113203734A CN202110467372.5A CN202110467372A CN113203734A CN 113203734 A CN113203734 A CN 113203734A CN 202110467372 A CN202110467372 A CN 202110467372A CN 113203734 A CN113203734 A CN 113203734A
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- granular
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- 239000002245 particle Substances 0.000 title claims abstract description 27
- 239000008187 granular material Substances 0.000 title claims abstract description 25
- 238000002474 experimental method Methods 0.000 title claims abstract description 8
- 238000010008 shearing Methods 0.000 title abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 230000008014 freezing Effects 0.000 claims abstract description 14
- 238000007710 freezing Methods 0.000 claims abstract description 14
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 239000005022 packaging material Substances 0.000 claims abstract description 6
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000013590 bulk material Substances 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 239000011236 particulate material Substances 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 6
- 239000000463 material Substances 0.000 abstract description 10
- 239000011362 coarse particle Substances 0.000 abstract description 7
- 239000002689 soil Substances 0.000 description 13
- 239000004927 clay Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a shear failure experimental method for granular materials of particles, which comprises the following steps: shaping: packaging the granular particles into a bulk material; freezing: filling water into the dough to a saturated state, and freezing and molding the saturated dough; cutting: the dough was taken out of the packaging material and cut under a low temperature environment, and the cut-out cut band was observed and measured. The invention can be used for observing and measuring the shearing failure zone of the bulk coarse particle material after the large triaxial shearing test, researching the failure condition of the coarse particles on the failure zone, and has important significance for better understanding the shear strength and failure mechanism of the coarse particles.
Description
Technical Field
The invention relates to a shearing and damaging experimental method for granular materials of loose particles.
Background
Because the soil is composed of countless particles with different sizes, the property determines that the forced damage of the soil body is shear damage. Coarse-grained soil has great practical significance for researching the shear resistance due to wide application. Studying the shear properties of coarse-grained soil includes studying its shear failure zone and the shape of the particles on the zone.
The coarse soil is divided into clay coarse soil and granular coarse soil, the clay fine particles in the clay coarse soil are more, and the soil body has certain viscosity, so that the particles cannot be dispersed to form granular shapes when being stressed, and the research on the shearing damage zone of the clay coarse soil is possible. The shear strength of coarse-grained soil is generally researched by adopting a large triaxial test in engineering, when the viscous coarse-grained soil is sheared and damaged, the whole test piece can keep integrity due to the existence of viscosity, so that a shear band can be kept, after the test piece is taken out from a pressure chamber, the development condition of the shear damage band can be observed from the appearance, and after the test piece is separated from the shear band through external force, the condition on the shear damage surface can still be clearly observed, such as the fluctuation degree, scratch distribution and the like. This is the current method of studying the shear failure plane of clayey coarse-grained soils.
The non-viscous granular coarse particles are not considered because the test pieces are taken out from the pressure chamber after the shear test is completed, and the particles are not sticky and are dispersed, and the state at the time of shear failure cannot be maintained.
Disclosure of Invention
In order to solve the technical problems, the invention provides a shearing and breaking experimental method for granular materials of the bulk materials of the granular materials of the non-viscosity after the granular materials of the bulk materials of the granular materials of the bulk materials of the granular materials of the bulk materials of the non-the bulk materials of the non-viscosity of the bulk materials of the shear breaking the shear of the non-viscosity of the shear of.
The invention is realized by the following technical scheme.
The invention provides an experimental method for shearing and breaking of granular materials of particles, which comprises the following steps:
shaping: packaging the granular particles into a bulk material;
freezing: filling water into the dough to a saturated state, and freezing and molding the saturated dough;
cutting: the dough was taken out of the packaging material and cut under a low temperature environment, and the cut-out cut band was observed and measured.
The particle size of the granular material of the granular particles is 13-17 mm.
The particle diameter of the granular material of the granular particles is 15 mm.
After the shaping step and before the freezing step, loading the granular material into a triaxial apparatus for a triaxial shear test.
The freezing and forming are carried out by putting the dough into a freezer.
The packaging material is a rubber film.
The granular material is formed by mixing cement and stone powder.
The cement is spherical.
The invention has the beneficial effects that: the shear failure belt can be used for observing and measuring a shear failure belt after a large triaxial shear test of a granular coarse particle material, researching the failure condition of coarse particles on the shear failure belt, and has important significance for better understanding of the shear strength and the failure mechanism of the coarse particles.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
Example 1
The shear failure experimental method for the granular material of the bulk granules shown in figure 1 comprises the following steps:
shaping: packaging the granular particles into a bulk material;
freezing: filling water into the dough to a saturated state, and freezing and molding the saturated dough;
cutting: the dough was taken out of the packaging material and cut under a low temperature environment, and the cut-out cut band was observed and measured.
Example 2
Based on example 1, the particle diameter of the granular material of the bulk particles is 13-17 mm.
Example 3
Based on example 2, and the particle size of the particulate material was 15 mm.
Example 4
Based on example 1, and after the sizing step and before the freezing step, the bulk particulate material was loaded into a tri-axial apparatus for a tri-axial shear test.
Example 5
Based on example 1, and the freeze-forming was performed by placing the dough in a freezer.
Example 6
Based on example 1, and the encapsulating material was a rubber film.
Example 7
Based on example 1, the granular material was formed by mixing cement and stone powder.
Example 8
Based on example 7, and the cement is spherical.
Example 9
Based on the above examples, the test material is specifically a pellet formed by mixing spherical cement and stone powder, and has a certain strength, and the particle size is about 15 mm; loading the granular material into a large triaxial apparatus according to a certain density, and carrying out a normal triaxial shear test; after the test is finished, the granular material is packaged in the rubber film, so that water can be injected into the sample material from the bottom of the test piece, and the gap in the whole test piece is filled with the water, so that the test piece is saturated. And (3) placing the saturated test piece into a freezer for low-temperature freezing, taking out the test piece from the rubber film after the test piece is completely frozen, longitudinally cutting the test piece at a low temperature by using a cutting machine, and exposing the shear band of the test piece on a cutting surface, so that the shear band can be observed and measured, and the movement and the breakage condition of particles on the shear band can be described.
Claims (8)
1. A shear failure experimental method for granular materials of particles is characterized in that: the method comprises the following steps:
shaping: packaging the granular particles into a bulk material;
freezing: filling water into the dough to a saturated state, and freezing and molding the saturated dough;
cutting: the dough was taken out of the packaging material and cut under a low temperature environment, and the cut-out cut band was observed and measured.
2. The method of testing shear failure of particulate material of claim 1, wherein: the particle size of the granular material of the granular particles is 13-17 mm.
3. The method for testing shear failure of a particulate material according to claim 2, wherein: the particle diameter of the granular material of the granular particles is 15 mm.
4. The method of testing shear failure of particulate material of claim 1, wherein: after the shaping step and before the freezing step, loading the granular material into a triaxial apparatus for a triaxial shear test.
5. The method of testing shear failure of particulate material of claim 1, wherein: the freezing and forming are carried out by putting the dough into a freezer.
6. The method of testing shear failure of particulate material of claim 1, wherein: the packaging material is a rubber film.
7. The method of testing shear failure of particulate material of claim 1, wherein: the granular material is formed by mixing cement and stone powder.
8. The method of testing shear failure of particulate material of claim 7, wherein: the cement is spherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467372.5A CN113203734A (en) | 2021-04-28 | 2021-04-28 | Shearing and damaging experimental method for granular materials of particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467372.5A CN113203734A (en) | 2021-04-28 | 2021-04-28 | Shearing and damaging experimental method for granular materials of particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113203734A true CN113203734A (en) | 2021-08-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110467372.5A Pending CN113203734A (en) | 2021-04-28 | 2021-04-28 | Shearing and damaging experimental method for granular materials of particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113203734A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230856A (en) * | 2011-03-21 | 2011-11-02 | 中国科学院寒区旱区环境与工程研究所 | Preparation method for icerich frozen soil sample |
| US20130050431A1 (en) * | 2011-08-29 | 2013-02-28 | Shiseido Company, Ltd. | Method of observing cross-section of cosmetic material |
| CN103852371A (en) * | 2014-03-12 | 2014-06-11 | 中国水电顾问集团贵阳勘测设计研究院有限公司 | Visual shearing and sample loading box applicable to direct shear test of coarse-grained soil |
| CN104634734A (en) * | 2015-02-11 | 2015-05-20 | 绍兴文理学院 | Method for determining optimal cohesive frozen moisture content of cohesiveless soil |
| CN104713758A (en) * | 2015-02-11 | 2015-06-17 | 绍兴文理学院 | Method for preparing triaxial test sample of cohesiveless soil |
| CN105115834A (en) * | 2015-06-26 | 2015-12-02 | 中国科学院地质与地球物理研究所 | Coarse-grained soil shear strength testing method under low temperature condition |
| CN106769410A (en) * | 2016-12-20 | 2017-05-31 | 盐城工学院 | A kind of frozen soil rotation shearing device |
-
2021
- 2021-04-28 CN CN202110467372.5A patent/CN113203734A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230856A (en) * | 2011-03-21 | 2011-11-02 | 中国科学院寒区旱区环境与工程研究所 | Preparation method for icerich frozen soil sample |
| US20130050431A1 (en) * | 2011-08-29 | 2013-02-28 | Shiseido Company, Ltd. | Method of observing cross-section of cosmetic material |
| CN103852371A (en) * | 2014-03-12 | 2014-06-11 | 中国水电顾问集团贵阳勘测设计研究院有限公司 | Visual shearing and sample loading box applicable to direct shear test of coarse-grained soil |
| CN104634734A (en) * | 2015-02-11 | 2015-05-20 | 绍兴文理学院 | Method for determining optimal cohesive frozen moisture content of cohesiveless soil |
| CN104713758A (en) * | 2015-02-11 | 2015-06-17 | 绍兴文理学院 | Method for preparing triaxial test sample of cohesiveless soil |
| CN105115834A (en) * | 2015-06-26 | 2015-12-02 | 中国科学院地质与地球物理研究所 | Coarse-grained soil shear strength testing method under low temperature condition |
| CN106769410A (en) * | 2016-12-20 | 2017-05-31 | 盐城工学院 | A kind of frozen soil rotation shearing device |
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Application publication date: 20210803 |